var mysql  = require('mysql');
var connection = mysql.createConnection({
  host     : 'localhost',
  user     : 'root',
  password : '123456',
  database : 'hg_web37'
});
let 
connection.query('', function (error, results, fields) {
    if (error) throw error;
    console.log('The solution is: ', results[0].solution);
  });